public class Example21 {
    public static void main(String[] args) {
        int sum1 = add(1, 2);
        int sum2 = add(1, 2, 3);
        double sum3 = add(1.2, 2.3);
        System.out.println("sum1=" + sum1);
        System.out.println("sum2=" + sum2);
        System.out.println("sum3=" + sum3);
    }
    public static int add(int x,int y) {
        return x+y;
    }
    public static int add(int x,int y, int z) {
        return x+y+z;
    }
    public static double add(double x, double y) {
        return x+y;

    }
    }
